\\[-1.8ex] Soil Heterogeneity & $-$1.455$^{***}$ & $-$1.407$^{***}$ & $-$1.101$^{***}$ & $-$1.126$^{***}$ & $-$1.079$^{***}$ & $-$0.992$^{***}$ & $-$0.542$^{***}$ \\ 
  & (0.380) & (0.294) & (0.266) & (0.267) & (0.269) & (0.249) & (0.198) \\ 
  & & & & & & & \\ 
 Share Using Fertilizer$_{t-1}$ &  &  &  &  &  &  & $-$2.786$^{***}$ \\ 
  &  &  &  &  &  &  & (0.195) \\ 
  & & & & & & & \\ 
\\[-1.8ex] 
Observations & 4,472 & 4,472 & 4,472 & 4,472 & 4,472 & 4,460 & 4,460 \\ 
R$^{2}$ & 0.007 & 0.347 & 0.365 & 0.366 & 0.369 & 0.373 & 0.404 \\ 
